CN110260032B - Push type high-pressure valve and valve opening method - Google Patents

Push type high-pressure valve and valve opening method Download PDF

Info

Publication number
CN110260032B
CN110260032B CN201910554492.1A CN201910554492A CN110260032B CN 110260032 B CN110260032 B CN 110260032B CN 201910554492 A CN201910554492 A CN 201910554492A CN 110260032 B CN110260032 B CN 110260032B
Authority
CN
China
Prior art keywords
valve
plug
valve plug
pressure
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910554492.1A
Other languages
Chinese (zh)
Other versions
CN110260032A (en
Inventor
栗夫园
姜笛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Machinery Equipment Research Institute
Original Assignee
Beijing Machinery Equipment Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Machinery Equipment Research Institute filed Critical Beijing Machinery Equipment Research Institute
Priority to CN201910554492.1A priority Critical patent/CN110260032B/en
Publication of CN110260032A publication Critical patent/CN110260032A/en
Application granted granted Critical
Publication of CN110260032B publication Critical patent/CN110260032B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention relates to a press type high-pressure valve and a valve opening method, belongs to the field of high-pressure valves, and solves the problems that the press type high-pressure valve in the prior art is large in valve opening force and high in sensitivity of flow speed to valve opening stroke. According to the invention, a secondary valve nesting mode is adopted, the primary valve plug is nested in the secondary valve plug, the secondary valve plug is of a hollow structure and is provided with a vent hole, the size of the primary valve plug is small, and the opening force for opening the primary valve is reduced; after the first-stage valve is opened, high-pressure gas in the first-stage valve escapes, the pressure difference between the inside and the outside of the second-stage valve plug is reduced, the valve opening force required for opening the second-stage valve is reduced, and the first-stage valve plug continuously moves forwards to push the second-stage valve to be opened. According to the invention, the two-stage valve is nested, and the first-stage valve and the two-stage valve are opened in sequence, so that the valve opening force is reduced, the sensitivity of the flow rate to the valve opening stroke during valve opening is reduced, and the control of the flow rate of fluid in the valve opening process is realized.

Description

Push type high-pressure valve and valve opening method
Technical Field
The invention relates to the technical field of high-pressure valves, in particular to a push type high-pressure valve and a valve opening method.
Background
The high-pressure valve is widely applied to the fields of superhard material manufacturing, chemical industry, petrochemical industry, ultrahigh static pressure extrusion, metal forming and the like. Can be used for controlling the flow of various types of fluid such as air, water, steam, mud, oil products, liquid metal and the like. According to different specific purposes and structures, the high-pressure ball valve, the high-pressure stop valve, the pressure reducing valve and the like are provided. According to the operation mode, the operation mode can be divided into a pressing type and a rotating type. The rotary valve is convenient to use, high in reliability and widely used. The use range of the push type valve is limited, but the function and the use scene of the push type valve cannot be replaced by a rotary valve.
High pressure valves are also widely used on high pressure air guns (PCP) and special cutters. For example, the WASP high-pressure gas cylinder dagger is a diving tool. The air pipe that highly compresses is had to handle of a knife inside, and the handle of a knife has a button control valve, presses down the back, and super high pressure air will be in the twinkling of an eye along the thin pipe way blowout in the blade to possess the unable function that has of ordinary cutter. On high pressure air guns (PCP), high pressure valves are also one of the indispensable devices. At present, most high-pressure air guns impact a high-pressure valve through a hammer, so that the quality of opening the high-pressure valve by an air passage is influenced, the function of the air gun is influenced, the consistency of the bullet discharging speed is influenced, the vibration condition of the air gun in the firing process is influenced, and the shooting precision is further influenced.
The push type high-pressure valve is used on an air gun and a WASP high-pressure gas cylinder dagger. An important characteristic parameter of the press type high pressure valve is the magnitude of the pressing force. The structure of a common pressing valve is shown in fig. 8, and the existing pressing valve is widely applied to low-pressure environments in life, such as mosquito killing sprays and the like. In general, the pressure difference between the inside and the outside of the valve is small, and the valve is suitable for being opened manually. At high pressures, a violent slam-open valve is usually required.
The existing pressing type valve has the following defects in the using process: 1. the press-open force is proportional to the gas pressure of the high-pressure gas and is usually too large. In order to open the valve, the valve opening force caused by the pressure difference between high-pressure gas and low-pressure gas is mainly required to be overcome. The valve opening force is proportional to the valve block area of the valve and the internal and external differential pressure values. When the internal and external pressure difference is large, the manual operation is very difficult, and if the area of the valve block is reduced, the vent hole is reduced, so that the ventilation capacity can not meet the requirement; 2. the flow rate is difficult to control. When the valve is opened, the flow rate is required to be adjusted, and after the valve is opened, the relation between the pressing stroke and the flow rate is very sensitive, so that the small pressing stroke can cause the flow rate to be remarkably increased. Therefore, the valve is usually depressed to reach the maximum ventilation state, which makes manual control difficult.
Disclosure of Invention
In view of the above analysis, the present invention is directed to a press-type high-pressure valve and a valve opening method thereof, which are used to solve the problems of the prior art that when the internal gas pressure of the press-type high-pressure valve is high, the valve opening force required for pressing and opening the valve is large under the condition of large difference between internal pressure and external pressure, the manual operation is very difficult, the impact valve opening force is large, the overall vibration is large, the precision is poor, if the area of a valve block is reduced, the vent hole is reduced, the ventilation capacity may not meet the requirement, and the press-type high-pressure valve has a very small valve opening stroke, and the fluid flow rate corresponding to the very small valve opening stroke is very large, so.
Therefore, it is necessary to design a push type high pressure valve to open the high pressure valve with a small valve opening force, and to reduce the sensitivity of the flow rate to the stroke, thereby controlling the flow rate of the fluid during the valve opening process.
The purpose of the invention is mainly realized by the following technical scheme:
a push type high pressure valve comprising: the high-pressure air cavity comprises a pressing rod, a valve shell, a primary valve plug, a secondary valve plug and a high-pressure air cavity;
the pressing rod is fixedly connected with the primary valve plug;
the primary valve plug is nested in the secondary valve plug; the secondary valve plug is arranged in the valve shell and is in contact installation with the valve shell through a conical surface; an air outlet is arranged on the valve shell;
the second-stage valve plug is of a hollow structure, and a first vent hole is formed in the second-stage valve plug; the first vent hole is communicated with the high-pressure air cavity.
Specifically, the primary valve plug is of a frustum structure.
Specifically, the secondary valve plug comprises: the secondary plug main body and the bottom of the secondary plug; the second-stage plug main body is fixedly connected with the bottom of the second-stage plug or is of an integral structure.
Specifically, a conical hole is formed in the main body of the secondary plug; the primary valve plug is nested in the conical hole, and the primary valve plug is tightly pressed on the secondary plug main body under the action of high-pressure gas in the high-pressure gas cavity.
Specifically, a conical surface is arranged outside the secondary plug main body; the valve shell is contacted and sealed with the conical surface, and the secondary valve plug is tightly pressed on the valve shell under the action of high-pressure gas of the high-pressure gas cavity.
Specifically, the secondary valve plug is also provided with a gas port stop block, and the gas port stop block is used for blocking the gas outlet.
Specifically, the gas port stop block is provided with a second vent hole, and the aperture of the second vent hole is smaller than that of the gas outlet.
Specifically, a first spring is arranged between the first-stage valve plug and the second-stage valve plug, and the first spring is used for resetting after the first-stage valve plug is pressed.
Specifically, a connecting piece is arranged on the high-pressure air cavity, a second spring is arranged between the secondary valve plug and the connecting piece, and the connecting piece is used for installing the second spring and limiting the pressing stroke of the secondary valve plug; the second spring is used for realizing the reset of the secondary valve plug after being pressed.
The valve opening method of the push type high-pressure valve comprises the following steps:
step S1: applying pressing force to the pressing rod to push the first-stage valve plug to open;
step S2: continuously pushing the first-stage valve plug to move towards the bottom of the second-stage plug of the second-stage valve plug until the first-stage valve plug contacts with the bottom of the second-stage plug;
step S3: the pressing force exerted on the pressing rod is increased, the secondary valve plug is pushed to move towards the high-pressure air cavity through the primary valve plug, and the valve is completely opened.
The invention has at least one of the following beneficial effects:
1. the press type high-pressure valve adopts a multi-stage nested plug. Through the mode that the multistage valve plugs of the high-pressure valve plug are sequentially opened, the first-stage valve plug is nested in the conical hole of the second-stage valve plug, the smaller the area of the end face of the first-stage valve plug is designed, the more the area of the initial valve opening bearing surface of the first-stage valve can be reduced, the further initial valve opening force can be reduced, the second-stage valve is opened after the first-stage valve is opened, high-pressure air is introduced to balance the pressure of the valve after the first-stage valve plug is opened, the force required by the second-stage valve to be further opened is reduced, and finally the high-pressure valve is opened by adopting smaller pressing valve opening force.
2. The press type high-pressure valve improves the relation between the flow rate and the stroke in the valve opening process through the multi-stage valve opening process, reduces the sensitivity between the flow rate and the press stroke, and enables the range of available flow rate to be wider.
3. The first spring is arranged between the first-stage valve plug and the second-stage valve plug, the second spring is arranged between the second-stage valve plug and the high-pressure air cavity, the spring is compressed when the valve is opened, and the spring is used for restoring when the valve is closed after the valve is opened. The sealing and resetting among the first-stage valve plug, the second-stage valve plug and the valve shell mainly depend on the internal and external pressure difference, and the spring is used for assisting in resetting when the pressure difference is small.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic view of a push type high pressure valve according to the present invention;
FIG. 2 is a sectional view of a first molded push type high pressure valve of the present invention;
FIG. 3 is a sectional view of a second molded push-type high pressure valve of the present invention;
FIG. 4 is a schematic view of a secondary valve plug according to the present invention;
FIG. 5 is a model view of a secondary valve plug of the present invention;
FIG. 6 is a cross-sectional view of a two-stage valve plug model of the present invention;
FIG. 7 is a schematic view illustrating a process of opening the pressing type high pressure valve according to the present invention;
fig. 8 shows a structure of a conventional push type valve in the prior art.
Reference numerals:
1-pressing rod; 2-a valve housing; 3-air outlet; 4-first-stage valve plug; 5-a second-stage valve plug; 51-a secondary plug body; 52-second-level plug bottom; 53-port stops; 54-a first vent; 55-a second vent; 511-conical bore; 512-conical surface; 6-high pressure air cavity; 7-a connector; 8-a first spring; 9-second spring.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
One embodiment of the present invention discloses a press type high pressure valve, as shown in fig. 1, including: the pressure valve comprises a pressing rod 1, a valve shell 2, a first-stage valve plug 4, a second-stage valve plug 5 and a high-pressure air cavity 6. High-pressure gas (or other high-pressure fluid) is stored in the high-pressure gas chamber 6, and the valve shell 2 is fixedly connected with the high-pressure gas chamber 6. The secondary valve plug 5 is arranged inside the valve shell 2 and is installed in contact with the valve shell 2 through a conical surface, and the structural schematic diagram of the press type high-pressure valve is shown in fig. 2 and 3. In other words, the conical surface 512 is disposed outside the secondary valve plug 5, the conical surface inside the valve housing 2 contacts with the conical surface 512, the valve housing 2 and the secondary valve plug 5 are sealed by the conical surface 512, and the internal high-pressure gas presses the secondary valve plug 5 against the valve housing 2.
Specifically, the valve housing 2 is provided with an air outlet 3 as a gas flow port after the valve is opened.
Specifically, the primary valve plug 4 is nested in the secondary valve plug 5, the primary valve plug 4 is of a frustum structure, and the primary valve plug 4 is fixedly connected with the pressing rod 1.
Specifically, the secondary valve plug 5 may be divided into three parts: a secondary plug body 51, a secondary plug base 52, and a vent stop 53. Further, the second-stage plug body 51 is provided with a first vent hole 54, and the vent stopper 53 is provided with a second vent hole, as shown in fig. 4, 5, and 6. The secondary plug body 51 is provided with a conical hole 511 and an external conical surface 512, the primary valve plug 4 is embedded in the conical hole 511, and the secondary valve plug 5 forms a seal with the valve shell 2 through the conical surface 512.
Namely: the outer end (the end close to the valve shell 2) of the second-stage valve plug 5 is provided with a conical hole 511, the conical hole 511 is a through hole, and the conical hole 511 is used for nesting the first-stage valve plug 4.
The outer part of one end of the second-stage valve plug 5, which is provided with the conical hole, is provided with a frustum-shaped structure with a conical surface 512, and the conical surface 512 is matched with the valve shell 2.
The secondary plug main body 51 and the secondary plug bottom 52 are fixedly connected or are in an integral structure, the secondary plug main body 51 and the secondary plug bottom 52 form an unclosed middle cavity, and the middle cavity is used as a moving space of the primary valve plug 4 when the primary valve is opened.
That is, the secondary plug body 51 serves as a main structure of the secondary valve plug 5, and on one hand, provides an air passage, and on the other hand, serves as a sealing interface and an installation interface of the primary valve plug 4. During assembly, the primary valve plug 4 is first placed into the conical bore 511 of the secondary valve plug 5, and then the secondary plug bottom 52 is connected to the secondary plug body 51. The second-stage plug bottom 52 and the second-stage plug main body 51 are connected into a whole through threads or welded, and the second-stage plug bottom 52 is used for limiting the pressing stroke of the first-stage valve plug 4.
The conical surface 512 outside the secondary valve plug 5 is matched with the valve shell 2 to realize sealing, the secondary valve plug 5 is pressed on the valve shell 2 by high-pressure gas in the high-pressure gas cavity 6, and meanwhile, the valve shell 2 can limit the secondary valve plug 5 to move towards the outer side of the valve.
Further, the secondary plug body 51 is provided with a plurality of first vent holes 54, as shown in fig. 4, 5, and 6. The first vent hole 54 is communicated with the high-pressure air cavity 6, so that internal high-pressure air can enter the middle cavity of the secondary valve plug 5 through the first vent hole 54, the primary valve plug 4 is pressed onto the conical hole 511 of the secondary valve plug 5, and meanwhile, the internal high-pressure air can flow to the outer side of the secondary valve plug 5 after the primary valve is opened, and the internal and external pressure difference of the secondary valve plug 5 is reduced.
Further, the first vent hole 54 may be disposed on the second-stage plug bottom 52, and it is only necessary to ensure that the first vent hole 54 is not blocked when the first-stage valve plug 4 contacts the second-stage plug bottom 52.
Further, in order to quickly increase the gas pressure in the cavity of the valve housing 2 after the first-stage valve is opened and reduce the pressure difference between the inside high-pressure gas and the outside low-pressure gas received by the second-stage valve plug 5, a gas port stopper 53 is further arranged on the second-stage valve plug 5, the gas port stopper 53 is installed on the second-stage plug main body 51, and the gas port stopper 53 can shield the gas outlet 3. The gas port stopper 53 is used for reducing the area of the gas outlet 3 when the primary valve is opened, increasing the pressure near the gas outlet 3, and reducing the force required by opening the secondary valve. After the first-stage valve stopper 4 is opened, the second vent hole 54 is provided in the port stopper 53 to keep the high-pressure valve in an open state at all times in order to maintain the gas flow. Meanwhile, in order to improve the pressure intensity outside the secondary valve plug 5, the aperture of the second vent hole 54 is smaller than that of the air outlet 3.
That is to say: the gas port stop block 53 is used for partially blocking the gas outlet 3, and after the two-stage valve plug 5 is installed in cooperation with the valve shell 2, the gas port stop block 53 can partially block the gas outlet 3, so that the area of actual gas circulation when the one-stage valve plug 4 is opened is reduced. The gas port block 53 is provided with a second vent hole 55, the aperture of the second vent hole 55 is smaller than that of the gas outlet 3, and the actual area of the gas outlet is the hole area of the second vent hole 55 provided on the gas port block 53.
The gas flow area at the gas outlet 3 is reduced, so that after the first-stage valve plug 4 is opened, the internal high-pressure gas temporarily stores in the inner cavity of the valve shell 2 between the gas outlet 3 and the first-stage valve plug 4, the gas pressure inside the gas outlet 3 is increased, namely the pressure outside the second-stage valve plug 5 is increased, the pressure difference between the high-pressure inside the inner side (high-pressure gas in the gas cavity) and the low-pressure outside (gas pressure inside the gas outlet 3) of the second-stage valve plug 5 is reduced, and the valve opening force required for opening the second-stage valve plug 5 is further reduced.
Specifically, according to press 1 and 4 fixed connection of one-level valve end cap, can promote one-level valve end cap 4 to remove and open one-level valve through exerting the pressing force to pressing 1 pole of pressing, the stroke is pressed in further increase, can further promote the removal of second grade valve end cap 5 and open the second grade valve.
The invention reduces the valve area of the first valve opening by providing a secondary (multiple) valve opening process, releases a certain high-pressure medium to the external environment after the primary valve plug is opened, reduces the internal and external pressure difference of the secondary valve, and opens the secondary valve plug 5 to complete the complete valve opening process.
Further, in order to realize the reset action of the first-stage valve plug 4 and the second-stage valve plug 5 when the valve is closed, a first spring 8 is arranged between the first-stage valve plug 4 and the second-stage valve plug 5, and the first spring 8 is used for realizing the reset action of the first-stage valve plug 4 after being pressed. The high-pressure air chamber 6 is provided with a connecting piece 7, a second spring 9 is arranged between the secondary valve plug 5 and the connecting piece 7, and the second spring 9 is used for realizing the reset action of the pressed secondary valve plug 5.
Under the closing condition, the first-stage valve plug 4 is pressed on the conical hole 511 of the second-stage valve plug 5 under the action of the internal and external pressure difference and the spring thrust of the first spring 8, the first-stage valve plug 4 and the second-stage valve plug 5 are sealed by using the taper, and meanwhile, the conical hole 511 of the second-stage valve plug 5 limits the first-stage valve plug 4 to move towards the outside of the valve, as shown in fig. 1.
The secondary valve plug 5 is pressed on the valve shell 2 by the internal and external pressure difference, the spring thrust of the second spring 9 and the acting force of the primary valve plug 4, and is sealed with the valve shell 2 by using taper, and meanwhile, the valve shell 2 limits the secondary valve plug 5 to move towards the outside of the valve, as shown in figure 1. The spring thrust is small, and the valve is mainly used for automatically closing the valve when no external force acts, namely under the condition that the pressure difference between the inside and the outside of the valve is small, the spring elasticity is utilized to reset the primary valve plug 4 and the secondary valve plug 5, and the valve is closed.
When the valve is implemented, pressing force is applied to the pressing rod 1 to push the first-stage valve plug 4 to be opened, high-pressure gas in the high-pressure gas cavity 6 overflows into the inner cavity of the valve shell 2, the pressure intensity outside the second-stage valve plug 5 is improved, the pressure intensity difference between high-pressure gas inside the second-stage valve plug 5 and low-pressure gas outside the second-stage valve plug 5 is reduced, and the valve opening force required for opening the second-stage valve plug 5 is reduced. After the pressing force of the valve disappears, the first-stage valve plug 4 and the second-stage valve plug 5 are restored to the closed state under the action of the elastic force of the spring and the difference between the internal pressure and the external pressure.
The invention reduces the resistance of the high-pressure valve when the high-pressure valve is opened by utilizing the combined structure of the two-stage (multi-stage) valve. Meanwhile, the change trend of the flow rate of the valve along with the pressing stroke is improved, and the performance of the pressing type valve is improved under the condition that the maximum flow rate of the valve is not influenced.
Example 2
The present embodiment provides a valve opening method for a push-type high-pressure valve, a valve opening process is shown in fig. 7, and the method specifically includes the following steps:
step S1: applying pressing force to the pressing rod 1 to push the first-stage valve plug 4 to open;
step S2: continuing to push the first-stage valve plug 4 to move towards the direction of the bottom 52 of the second-stage plug of the second-stage valve plug 5 until the first-stage valve plug 4 is contacted with the bottom 52 of the second-stage plug;
step S3: the pressing force applied to the pressing rod 1 is increased, the primary valve plug 4 and the secondary valve plug 5 are pushed to synchronously move towards the direction of the high-pressure air cavity, and the valve is completely opened.
Specifically, in step S1: when the primary valve plug 4 is pressed, the resistance to be overcome is the internal and external pressure difference acting on the primary valve plug 4. When the first-stage valve plug 4 is opened, the cross-sectional area of the fluid outlet is S1，S1The size of the valve plug (4) depends on the area of the lower end surface (large end surface) of the first-stage valve plug (4), and the smaller the size of the first-stage valve plug (4) is, the smaller the fluid area (S) is when the valve is opened1The smaller, and therefore, S1Can be designed to be small in cross section, and when the secondary valve plug 5 is opened, the cross section area of the fluid outlet is S2And S is2Greater than S1。
Compared with other press type valve structures, the valve opening pressing force required by opening the first-stage valve plug 4 is F under the same flow rate design condition1＝(Ph-Pl)×S1Wherein P ishPressure of gas in high-pressure vessel, PlThe pressure of the gas in the external low-pressure region (usually atmospheric pressure); under the condition of the same internal and external pressure difference, the pressing force required by the conventional press type valve is F0＝(Ph-Pl)×(S1+S2). Therefore, the fluid section area S can be reduced by designing the structural parameters of the first-stage valve plug 4 to be very small1Furthermore, the pressing force F required for opening the valve can be obviously reduced1。
In step S2, after the first-stage valve plug 4 contacts the second-stage valve plug 5 under the action of the pressing force, the second-stage valve plug 5 does not completely close the communication between the high-pressure region and the external low-pressure region. The high-pressure fluid medium can move from the inner high-pressure region to the outer low-pressure region through the first ventilation hole 54 and the second ventilation hole 55 on the secondary valve plug 5 and the gap between the primary valve plug 4 and the secondary valve plug 5.
When the first-stage valve plug 4 is in contact with the bottom 52 of the second-stage plug of the second-stage valve plug 5, the internal high-pressure gas is introduced after the first-stage valve plug 4 is temporarily stored and opened to balance the valve pressure, part of the internal high-pressure gas flows into the middle cavity of the second-stage valve plug 5, and the pressure state at the moment is the internal high-pressure gas pressure PhIs greater than the pressure P of the gas in the middle cavity of the secondary valve plug 5l' greater than the ambient pressure PlNamely: ph＞Pl′＞Pl. The internal and external pressure difference of the two-stage valve plug 5 is (P)h-Pl') the difference between the internal and external gas pressure when the valve plug 4 is opened is lower than that when the first-stage valve plug 4 is opened, is (P)h-Pl)。
Considering that the secondary valve plug 5 has a low pressure P outsidelThe height of the' is related to the opening degree of the first-stage valve plug 4 and the cross-sectional area of the gas outlet 3, the larger the opening of the first-stage valve plug 4 is, the smaller the flow area of the gas outlet 3 is, and the pressure P of the gas between the gas outlet 3 and the second-stage valve plug 5 isl' the larger, the pressure difference (P) that needs to be overcome to open the secondary valve plug 5h-Pl') the smaller the opening force to open the secondary valve plug 5.
Therefore, the air outlet 3 is designed to be blocked by the air port stopper 53 of the secondary valve plug 5, the air port stopper 53 is provided with a second vent hole 55 with an extremely small aperture, and the cross-sectional area of the second vent hole 55 is designed to be 0.1S1Before the second valve plug 5 is opened, the overlapped part of the second vent hole 55 and the gas outlet 3 is the size of the actual gas flow aperture, that is, the actual gas flow area of the gas outlet 3 is about 0.1S1Tests prove that when the plug 4 of the primary valve of the press type high-pressure valve is completely opened, the P can be effectively increasedl' to 0.7PhSize.
The secondary valve plug 5 is pressed on the valve shell 2 continuously under the action of pressure difference and fluid movement resistance. The flow rate of the valve can be adjusted by controlling the pressing stroke of the first-stage valve plug 4. The first-stage valve plug 4 is contacted with the second-stage valve plug 5 after reaching the maximum stroke, and the pressing stroke is continuously increased at the moment, so that the second-stage valve plug 5 can be opened.
Specifically, in step S3: and continuously applying force to the pressing rod 1, transmitting the pressing force applied to the pressing rod 1 to the secondary valve plug 5 through the primary valve plug 4 to push the secondary valve plug 5 to open, wherein the flow rate of the valve is related to the external dimension parameters of the secondary valve plug 5 and the pressing stroke of the secondary valve plug 5, and the flow rate of the valve can be adjusted by controlling the pressing stroke of the secondary valve plug 5.
After the first-stage valve plug 4 is opened, the pressure difference acting on the second-stage valve plug 5 is reduced, and the valve opening force for opening the second-stage valve plug 5 is F2＝(Ph-Pl′)×S2The force required to act on the pressing lever is F ═ Ph-Pl′)×(S1+S2). After the secondary valve plug 5 is opened, the gas port stop block 53 on the secondary valve plug 5 does not block the gas outlet 3 any more, the valve is completely opened, and the flow rate of the valve reaches the maximum.
It can be seen that, by the method of two-stage (multi-stage) nesting of the valve plug according to the present invention, the maximum pressing force on the pressing rod 1 is F ═ P (P) at the same flow rateh-Pl′)×(S1+S2) Or F ═ Ph-Pl)×S1Lower than the pressing force F required by a common valve0＝(Ph-Pl)×(S1+S2). The maximum pressing force of the pressing type high-pressure valve on the pressing rod 1 is F ═ Ph-Pl′)×(S1+S2) When is in Pl' Up to 0.7PhIt is calculated that the maximum pressing force can be reduced to 30% of the normal valve.
Specifically, in the process of using the press valve, the change mode of the press force is gradually increased and then gradually decreased, and the condition that the valve cannot be opened at all can not occur.
An operator pushes the first-stage valve plug 4 to open through the pressing rod 1, the first-stage valve plug 4 compresses the first spring 8, the stroke of the first-stage valve plug 4 is gradually increased to push the second-stage valve plug 5 to open, and the second-stage valve plug 5 compresses the second spring 9. After the pressing force of an operator on the valve disappears, the two-stage valve plugs are restored to the closed state under the action of the spring force and the internal and external pressure difference.
Example 3
In this embodiment, an alternative to the push type high pressure valve of embodiment 1 is provided, and a two-stage valve opening process is implemented by using a double push rod. Two press the depression bar to be connected with one-level valve end cap 4 and second grade valve end cap 5 respectively, and the order of controlling one-level valve end cap 4 and second grade valve end cap 5 is opened valve, promptly: the first pressing rod pushes and pulls the primary valve plug 4 to open and close the primary valve plug; the second pressing rod acts directly on the secondary valve plug 5. Through combining two poles, realize once pressing the in-process, two are pressed the action of pressing the pole in proper order, finally realize the small thrust valve opening.
In the scheme of this embodiment, two-stage valve plugs are adopted, and in practice, three-stage or even more-stage valve plugs can be selected for multi-stage nesting, so that the valve opening process of the high-pressure valve is subdivided into a multi-stage valve opening process, and the small-thrust valve opening and the accurate control of the valve opening process are realized.
The push type high-pressure valve has at least one of the following beneficial effects:
1. the valve opening force is reduced, and the reliability of the valve opening operation is improved.
The invention reduces the valve area of the first valve opening by providing a secondary (multiple) valve opening process, releases a certain high-pressure medium to the external environment after the primary valve plug is opened, reduces the internal and external pressure difference of the secondary valve, and opens the secondary valve plug 5 to complete the complete valve opening process. The primary valve reduces the opening force by reducing the area of the end face of the primary valve plug 4, and the secondary valve reduces the maximum opening force by reducing the internal and external pressure difference of the secondary valve plug 5.
According to the invention, the initial valve opening force and the maximum valve opening force can be obviously reduced in a multi-stage nesting mode. Compared with the common valve, the valve can be reduced by more than 70 percent. In practical application, the operation difficulty of the press type valve is reduced, and the application range of the press type high-pressure valve is enlarged. For example, on a high-pressure air gun, the force of the hammer can be reduced, the impact is reduced, and the shooting precision is improved.
2. In the valve opening process of the press type high-pressure valve, the flow rate is gradually transited from zero to the maximum flow rate. The valve can have a small flow rate under a small pressing stroke, and the maximum flow rate of the valve is not influenced. In practical application, the device can be used for obtaining low-flow-rate high-pressure fluid and also can be used for obtaining high-flow-rate high-pressure fluid. The valve can be directly operated to control a certain degree on occasions where the flow rate of high-pressure fluid needs to be controlled.
3. In the process of using the press valve, the change mode of the press force is gradually increased and then gradually decreased, and the situation that the valve cannot be opened completely does not occur.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (8)

1. The utility model provides a push type high pressure valve which characterized in that includes: the valve comprises a pressing rod (1), a valve shell (2), a primary valve plug (4), a secondary valve plug (5) and a high-pressure air cavity (6);
the pressing rod (1) is fixedly connected with the primary valve plug (4);
the primary valve plug (4) is nested in the secondary valve plug (5); the secondary valve plug (5) is arranged inside the valve shell (2) and is installed in contact with the valve shell (2) through a conical surface; an air outlet (3) is arranged on the valve shell (2);
the secondary valve plug (5) is of a hollow structure, and a first vent hole (54) is formed in the secondary valve plug (5); the first vent hole (54) is communicated with the high-pressure air cavity (6);
a first spring (8) is arranged between the primary valve plug (4) and the secondary valve plug (5), and the first spring (8) is used for realizing the reset after the primary valve plug (4) is pressed;
a connecting piece (7) is arranged on the high-pressure air cavity (6), a second spring (9) is arranged between the secondary valve plug (5) and the connecting piece (7), and the connecting piece (7) is used for installing the second spring (9) and limiting the pressing stroke of the secondary valve plug (5); and the second spring (9) is used for realizing the reset of the secondary valve plug (5) after being pressed.
2. The push type high pressure valve according to claim 1, wherein the primary valve plug (4) is of a frustum structure.
3. The push type high pressure valve according to claim 2, wherein the secondary valve plug (5) comprises: a secondary plug body (51) and a secondary plug bottom (52); the secondary plug main body (51) and the secondary plug bottom (52) are fixedly connected or are of an integral structure.
4. The push type high-pressure valve according to claim 3, wherein the secondary plug body (51) is provided with a conical hole (511); the primary valve plug (4) is nested in the conical hole (511), and the primary valve plug (4) is tightly pressed on the secondary plug main body (51) under the action of high-pressure gas in the high-pressure gas cavity (6).
5. The push type high-pressure valve according to claim 4, characterized in that the outer part of the secondary plug body (51) is provided with a conical surface (512); the valve shell (2) is in contact with the conical surface (512) and sealed, and the secondary valve plug (5) is tightly pressed on the valve shell (2) under the action of high-pressure gas of the high-pressure gas cavity (6).
6. The push type high pressure valve according to any one of claims 1 to 5, wherein a gas port stopper (53) is further disposed on the secondary valve plug (5), and the gas port stopper (53) is used for shielding the gas outlet (3).
7. The push type high pressure valve according to claim 6, wherein the gas port block (53) is provided with a second vent hole (55), and the diameter of the second vent hole (55) is smaller than that of the gas outlet (3).
8. The method for opening the push type high-pressure valve as claimed in any one of claims 1 to 7, comprising the steps of:
step S1: applying pressing force to the pressing rod (1) to push the primary valve plug (4) to open;
step S2: continuously pushing the first-stage valve plug (4) to move towards the direction of the bottom (52) of the second-stage plug of the second-stage valve plug (5) until the first-stage valve plug (4) is contacted with the bottom (52) of the second-stage plug;
step S3: the pressing force applied to the pressing rod (1) is increased, and the secondary valve plug (5) is pushed to move towards the direction of the high-pressure air cavity through the primary valve plug (4), so that the valve is completely opened.
CN201910554492.1A 2019-06-25 2019-06-25 Push type high-pressure valve and valve opening method Active CN110260032B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910554492.1A CN110260032B (en) 2019-06-25 2019-06-25 Push type high-pressure valve and valve opening method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910554492.1A CN110260032B (en) 2019-06-25 2019-06-25 Push type high-pressure valve and valve opening method

Publications (2)

Publication Number Publication Date
CN110260032A CN110260032A (en) 2019-09-20
CN110260032B true CN110260032B (en) 2020-11-06

Family

ID=67921279

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910554492.1A Active CN110260032B (en) 2019-06-25 2019-06-25 Push type high-pressure valve and valve opening method

Country Status (1)

Country Link
CN (1) CN110260032B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112206940B (en) * 2020-10-09 2022-05-17 王小安 High-pressure water gun with compensation structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2315359Y (en) * 1997-03-10 1999-04-21 陈金富 Multifunction automatic water saving device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87200963U (en) * 1987-01-24 1988-01-20 汪惠平 Leakproof auto-shut valve
CN88207370U (en) * 1988-06-25 1988-12-28 北京市劳动保护科学研究所 Low noise valve
CN2606223Y (en) * 2003-03-11 2004-03-10 郑子炜 Antiburning stopcock for drinker
CN201448501U (en) * 2009-05-22 2010-05-05 张家和 Pressure relief valve
CN201539617U (en) * 2009-11-24 2010-08-04 杨颖杰 Manual exhaust valve for radiators
US10024439B2 (en) * 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2315359Y (en) * 1997-03-10 1999-04-21 陈金富 Multifunction automatic water saving device

Also Published As

Publication number Publication date
CN110260032A (en) 2019-09-20

Similar Documents

Publication Publication Date Title
US6105610A (en) Cartridge valve with triple sequential seal
CN110260032B (en) Push type high-pressure valve and valve opening method
US2787249A (en) Pressurizing means for ink devices
CN111981168A (en) Pilot operated safety valve
CN220082138U (en) Valve core and high-pressure cleaning water gun with same
EP3284987B1 (en) Flexible stem bellow assembly
CN205578773U (en) Ball valve sealing structure
US2778259A (en) Movable jaw wrench and hydraulically controlled stop device therefor
CN108105394B (en) Pneumatic stop valve
US4137941A (en) Discharge valves
CN113074256B (en) Electromagnetic valve
CN201236952Y (en) Liquid-gas pressure break valve
CN114688264A (en) Electromagnetic gas emergency cut-off valve capable of being opened under pressure
CN110425115B (en) Compressor and refrigeration equipment with same
CN210687029U (en) Long-life double-spool stop valve
JP2996563B2 (en) Packing structure
US20030111115A1 (en) Valve assembly
US5378116A (en) Over-pressure relief means
CN218598864U (en) High-pressure diaphragm valve
CN109779997A (en) A kind of hydraulic trigger-type automatically resets hydraulic valve
JP2019113102A (en) Air cylinder
JP2912867B2 (en) Mechanical valve of spool valve type
CN208816728U (en) A kind of eccentric ball valve
CN110454455B (en) Switch device of hydraulic oil way
CN215763607U (en) Cascade valve clack type pressure reducing valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant